Chanjula Pin, Cherdthong Anusorn
Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla 90112, Thailand.
Tropical Feed Resources Research and Development Center (TROFREC), Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Asian-Australas J Anim Sci. 2018 Apr;31(4):514-521. doi: 10.5713/ajas.17.0194. Epub 2017 Aug 22.
This experiment was conducted to investigate the effects of crude glycerin from waste vegetable oil (CGWVO) on performance, carcass traits, meat quality, and muscle chemical composition.
Twenty-four crossbred (Thai Native×Anglo Nubian) uncastrated male goats (16.8± 0.46 kg body weight [BW]) were assigned to a completely randomized design and subjected to four experimental diets containing 0%, 2%, 4%, and 6% of CGWVO (63.42% of glycerol and 47.78% of crude fat) on a dry matter (DM) basis. The diets were offered as total mixed rations twice daily. The feed intake, feeding behavior, growth performance, carcass and meat traits, and muscle chemical composition were evaluated.
Based on this experiment, there were significant differences (p>0.05) among groups regarding DM intake, growth performance, and carcass traits where goats receiving 6% of CGWVO had lower daily DM intake, growth performance, and carcass traits than those fed on 0%, 2%, and 4% of CGWVO. There were no effects of CGWVO on carcass length, carcass width, muscle (LM) area, Warner-Bratzler shear force, pH and color of LM at 45 min after slaughter, as well as on other carcass cut and muscle chemical composition.
In conclusion, the addition of up to 4% of DM in the diets for crossbred finishing goats seems to be the most interesting strategy, since it promotes greatest animal performance. Moreover, this study was a suitable approach to exploit the use of biodiesel production from waste vegetable oil for goat production.
本试验旨在研究废植物油粗甘油（CGWVO）对生长性能、胴体性状、肉质和肌肉化学成分的影响。
将24只杂交（泰国本地山羊×英努山羊）未阉割公山羊（体重16.8±0.46千克）采用完全随机设计，分为四组，分别饲喂含0%、2%、4%和6%CGWVO（甘油含量63.42%，粗脂肪含量47.78%）的四种试验日粮，日粮以干物质（DM）计。日粮制成全混合日粮，每天分两次投喂。评估采食量、采食行为、生长性能、胴体和肉质性状以及肌肉化学成分。
基于本试验，各组在干物质采食量、生长性能和胴体性状方面存在显著差异（p>0.05），其中采食6%CGWVO的山羊的每日干物质采食量、生长性能和胴体性状低于采食0%、2%和4%CGWVO的山羊。CGWVO对胴体长度、胴体宽度、肌肉（腰大肌）面积、宰后45分钟时腰大肌的Warner-Bratzler剪切力、pH值和颜色，以及其他胴体切块和肌肉化学成分均无影响。
总之，在杂交育肥山羊日粮中添加高达4%的干物质似乎是最理想的策略，因为它能促进最佳的动物生长性能。此外，本研究是利用废植物油生产生物柴油用于山羊生产的一种合适方法。
